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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.jxpath.ri.compiler;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import org.apache.commons.jxpath.ri.Compiler;<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>    /**<a name="line.21"></a>
<FONT color="green">022</FONT>     * @author Dmitri Plotnikov<a name="line.22"></a>
<FONT color="green">023</FONT>     * @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $<a name="line.23"></a>
<FONT color="green">024</FONT>     */<a name="line.24"></a>
<FONT color="green">025</FONT>    public class Step {<a name="line.25"></a>
<FONT color="green">026</FONT>        private int axis;<a name="line.26"></a>
<FONT color="green">027</FONT>        private NodeTest nodeTest;<a name="line.27"></a>
<FONT color="green">028</FONT>        private Expression[] predicates;<a name="line.28"></a>
<FONT color="green">029</FONT>    <a name="line.29"></a>
<FONT color="green">030</FONT>        /**<a name="line.30"></a>
<FONT color="green">031</FONT>         * Create a new Step.<a name="line.31"></a>
<FONT color="green">032</FONT>         * @param axis axis code<a name="line.32"></a>
<FONT color="green">033</FONT>         * @param nodeTest step test<a name="line.33"></a>
<FONT color="green">034</FONT>         * @param predicates predicate expressions<a name="line.34"></a>
<FONT color="green">035</FONT>         */<a name="line.35"></a>
<FONT color="green">036</FONT>        protected Step(int axis, NodeTest nodeTest, Expression[] predicates) {<a name="line.36"></a>
<FONT color="green">037</FONT>            this.axis = axis;<a name="line.37"></a>
<FONT color="green">038</FONT>            this.nodeTest = nodeTest;<a name="line.38"></a>
<FONT color="green">039</FONT>            this.predicates = predicates;<a name="line.39"></a>
<FONT color="green">040</FONT>        }<a name="line.40"></a>
<FONT color="green">041</FONT>    <a name="line.41"></a>
<FONT color="green">042</FONT>        /**<a name="line.42"></a>
<FONT color="green">043</FONT>         * Get the axis code.<a name="line.43"></a>
<FONT color="green">044</FONT>         * @return int<a name="line.44"></a>
<FONT color="green">045</FONT>         */<a name="line.45"></a>
<FONT color="green">046</FONT>        public int getAxis() {<a name="line.46"></a>
<FONT color="green">047</FONT>            return axis;<a name="line.47"></a>
<FONT color="green">048</FONT>        }<a name="line.48"></a>
<FONT color="green">049</FONT>    <a name="line.49"></a>
<FONT color="green">050</FONT>        /**<a name="line.50"></a>
<FONT color="green">051</FONT>         * Get the step test.<a name="line.51"></a>
<FONT color="green">052</FONT>         * @return NodeTest<a name="line.52"></a>
<FONT color="green">053</FONT>         */<a name="line.53"></a>
<FONT color="green">054</FONT>        public NodeTest getNodeTest() {<a name="line.54"></a>
<FONT color="green">055</FONT>            return nodeTest;<a name="line.55"></a>
<FONT color="green">056</FONT>        }<a name="line.56"></a>
<FONT color="green">057</FONT>    <a name="line.57"></a>
<FONT color="green">058</FONT>        /**<a name="line.58"></a>
<FONT color="green">059</FONT>         * Get the predicates.<a name="line.59"></a>
<FONT color="green">060</FONT>         * @return Expression[]<a name="line.60"></a>
<FONT color="green">061</FONT>         */<a name="line.61"></a>
<FONT color="green">062</FONT>        public Expression[] getPredicates() {<a name="line.62"></a>
<FONT color="green">063</FONT>            return predicates;<a name="line.63"></a>
<FONT color="green">064</FONT>        }<a name="line.64"></a>
<FONT color="green">065</FONT>    <a name="line.65"></a>
<FONT color="green">066</FONT>        /**<a name="line.66"></a>
<FONT color="green">067</FONT>         * Learn whether this step contains any predicate that is context dependent.<a name="line.67"></a>
<FONT color="green">068</FONT>         * @return boolean<a name="line.68"></a>
<FONT color="green">069</FONT>         */<a name="line.69"></a>
<FONT color="green">070</FONT>        public boolean isContextDependent() {<a name="line.70"></a>
<FONT color="green">071</FONT>            if (predicates != null) {<a name="line.71"></a>
<FONT color="green">072</FONT>                for (int i = 0; i &lt; predicates.length; i++) {<a name="line.72"></a>
<FONT color="green">073</FONT>                    if (predicates[i].isContextDependent()) {<a name="line.73"></a>
<FONT color="green">074</FONT>                        return true;<a name="line.74"></a>
<FONT color="green">075</FONT>                    }<a name="line.75"></a>
<FONT color="green">076</FONT>                }<a name="line.76"></a>
<FONT color="green">077</FONT>            }<a name="line.77"></a>
<FONT color="green">078</FONT>            return false;<a name="line.78"></a>
<FONT color="green">079</FONT>        }<a name="line.79"></a>
<FONT color="green">080</FONT>    <a name="line.80"></a>
<FONT color="green">081</FONT>        public String toString() {<a name="line.81"></a>
<FONT color="green">082</FONT>            StringBuffer buffer = new StringBuffer();<a name="line.82"></a>
<FONT color="green">083</FONT>            int axis = getAxis();<a name="line.83"></a>
<FONT color="green">084</FONT>            if (axis == Compiler.AXIS_CHILD) {<a name="line.84"></a>
<FONT color="green">085</FONT>                buffer.append(nodeTest);<a name="line.85"></a>
<FONT color="green">086</FONT>            }<a name="line.86"></a>
<FONT color="green">087</FONT>            else if (axis == Compiler.AXIS_ATTRIBUTE) {<a name="line.87"></a>
<FONT color="green">088</FONT>                buffer.append('@');<a name="line.88"></a>
<FONT color="green">089</FONT>                buffer.append(nodeTest);<a name="line.89"></a>
<FONT color="green">090</FONT>            }<a name="line.90"></a>
<FONT color="green">091</FONT>            else if (axis == Compiler.AXIS_SELF<a name="line.91"></a>
<FONT color="green">092</FONT>                    &amp;&amp; nodeTest instanceof NodeTypeTest<a name="line.92"></a>
<FONT color="green">093</FONT>                    &amp;&amp; ((NodeTypeTest) nodeTest).getNodeType()<a name="line.93"></a>
<FONT color="green">094</FONT>                        == Compiler.NODE_TYPE_NODE) {<a name="line.94"></a>
<FONT color="green">095</FONT>                buffer.append(".");<a name="line.95"></a>
<FONT color="green">096</FONT>            }<a name="line.96"></a>
<FONT color="green">097</FONT>            else if (axis == Compiler.AXIS_PARENT<a name="line.97"></a>
<FONT color="green">098</FONT>                    &amp;&amp; nodeTest instanceof NodeTypeTest<a name="line.98"></a>
<FONT color="green">099</FONT>                    &amp;&amp; ((NodeTypeTest) nodeTest).getNodeType()<a name="line.99"></a>
<FONT color="green">100</FONT>                        == Compiler.NODE_TYPE_NODE) {<a name="line.100"></a>
<FONT color="green">101</FONT>                buffer.append("..");<a name="line.101"></a>
<FONT color="green">102</FONT>            }<a name="line.102"></a>
<FONT color="green">103</FONT>            else if (axis == Compiler.AXIS_DESCENDANT_OR_SELF<a name="line.103"></a>
<FONT color="green">104</FONT>                    &amp;&amp; nodeTest instanceof NodeTypeTest<a name="line.104"></a>
<FONT color="green">105</FONT>                    &amp;&amp; ((NodeTypeTest) nodeTest).getNodeType()<a name="line.105"></a>
<FONT color="green">106</FONT>                        == Compiler.NODE_TYPE_NODE<a name="line.106"></a>
<FONT color="green">107</FONT>                    &amp;&amp; (predicates == null || predicates.length == 0)) {<a name="line.107"></a>
<FONT color="green">108</FONT>                buffer.append("");<a name="line.108"></a>
<FONT color="green">109</FONT>            }<a name="line.109"></a>
<FONT color="green">110</FONT>            else {<a name="line.110"></a>
<FONT color="green">111</FONT>                buffer.append(axisToString(axis));<a name="line.111"></a>
<FONT color="green">112</FONT>                buffer.append("::");<a name="line.112"></a>
<FONT color="green">113</FONT>                buffer.append(nodeTest);<a name="line.113"></a>
<FONT color="green">114</FONT>            }<a name="line.114"></a>
<FONT color="green">115</FONT>            Expression[] predicates = getPredicates();<a name="line.115"></a>
<FONT color="green">116</FONT>            if (predicates != null) {<a name="line.116"></a>
<FONT color="green">117</FONT>                for (int i = 0; i &lt; predicates.length; i++) {<a name="line.117"></a>
<FONT color="green">118</FONT>                    buffer.append('[');<a name="line.118"></a>
<FONT color="green">119</FONT>                    buffer.append(predicates[i]);<a name="line.119"></a>
<FONT color="green">120</FONT>                    buffer.append(']');<a name="line.120"></a>
<FONT color="green">121</FONT>                }<a name="line.121"></a>
<FONT color="green">122</FONT>            }<a name="line.122"></a>
<FONT color="green">123</FONT>            return buffer.toString();<a name="line.123"></a>
<FONT color="green">124</FONT>        }<a name="line.124"></a>
<FONT color="green">125</FONT>    <a name="line.125"></a>
<FONT color="green">126</FONT>        /**<a name="line.126"></a>
<FONT color="green">127</FONT>         * Decode an axis code to its name.<a name="line.127"></a>
<FONT color="green">128</FONT>         * @param axis int code<a name="line.128"></a>
<FONT color="green">129</FONT>         * @return String name.<a name="line.129"></a>
<FONT color="green">130</FONT>         * @see Compiler<a name="line.130"></a>
<FONT color="green">131</FONT>         * @see http://www.w3.org/TR/xpath#axes<a name="line.131"></a>
<FONT color="green">132</FONT>         */<a name="line.132"></a>
<FONT color="green">133</FONT>        public static String axisToString(int axis) {<a name="line.133"></a>
<FONT color="green">134</FONT>            switch (axis) {<a name="line.134"></a>
<FONT color="green">135</FONT>                case Compiler.AXIS_SELF :<a name="line.135"></a>
<FONT color="green">136</FONT>                    return "self";<a name="line.136"></a>
<FONT color="green">137</FONT>                case Compiler.AXIS_CHILD :<a name="line.137"></a>
<FONT color="green">138</FONT>                    return "child";<a name="line.138"></a>
<FONT color="green">139</FONT>                case Compiler.AXIS_PARENT :<a name="line.139"></a>
<FONT color="green">140</FONT>                    return "parent";<a name="line.140"></a>
<FONT color="green">141</FONT>                case Compiler.AXIS_ANCESTOR :<a name="line.141"></a>
<FONT color="green">142</FONT>                    return "ancestor";<a name="line.142"></a>
<FONT color="green">143</FONT>                case Compiler.AXIS_ATTRIBUTE :<a name="line.143"></a>
<FONT color="green">144</FONT>                    return "attribute";<a name="line.144"></a>
<FONT color="green">145</FONT>                case Compiler.AXIS_NAMESPACE :<a name="line.145"></a>
<FONT color="green">146</FONT>                    return "namespace";<a name="line.146"></a>
<FONT color="green">147</FONT>                case Compiler.AXIS_PRECEDING :<a name="line.147"></a>
<FONT color="green">148</FONT>                    return "preceding";<a name="line.148"></a>
<FONT color="green">149</FONT>                case Compiler.AXIS_FOLLOWING :<a name="line.149"></a>
<FONT color="green">150</FONT>                    return "following";<a name="line.150"></a>
<FONT color="green">151</FONT>                case Compiler.AXIS_DESCENDANT :<a name="line.151"></a>
<FONT color="green">152</FONT>                    return "descendant";<a name="line.152"></a>
<FONT color="green">153</FONT>                case Compiler.AXIS_ANCESTOR_OR_SELF :<a name="line.153"></a>
<FONT color="green">154</FONT>                    return "ancestor-or-self";<a name="line.154"></a>
<FONT color="green">155</FONT>                case Compiler.AXIS_FOLLOWING_SIBLING :<a name="line.155"></a>
<FONT color="green">156</FONT>                    return "following-sibling";<a name="line.156"></a>
<FONT color="green">157</FONT>                case Compiler.AXIS_PRECEDING_SIBLING :<a name="line.157"></a>
<FONT color="green">158</FONT>                    return "preceding-sibling";<a name="line.158"></a>
<FONT color="green">159</FONT>                case Compiler.AXIS_DESCENDANT_OR_SELF :<a name="line.159"></a>
<FONT color="green">160</FONT>                    return "descendant-or-self";<a name="line.160"></a>
<FONT color="green">161</FONT>                default:<a name="line.161"></a>
<FONT color="green">162</FONT>                    return "UNKNOWN";<a name="line.162"></a>
<FONT color="green">163</FONT>            }<a name="line.163"></a>
<FONT color="green">164</FONT>        }<a name="line.164"></a>
<FONT color="green">165</FONT>    }<a name="line.165"></a>




























































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